Chain



(No Model.) 7

- A. B. HENDRYX.

4 CHAIN.

Patented June 3, 1890.

a mans cm, PHOl'O-UTH UNITED STATES PATENT OF ICE.

ANDREW B. HENDRYX, OF NEW HAVEN, CONNECTICUT.

CHAIN.

, SPEGIFIGATION forming part of Letters Patent No. 429,445, dated June 3, 1890.

Application filed February 19, 1890. Serial No. 341,040. (No model.)

To all whom it may concern.-

Be it known that 1, ANDREW B. HENDRYX, of New Haven,in the county of New Haven and State of Connecticut, have invented new Improvements in Chains, (Case B and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a portion of a chain composed of elongated links embodying the invention; Fig. 2, a similar construction of links, but of ring or circular shape; Fig. 3, a side view of an elongated link complete; Fig. 4, a top view of the same; and Fig. 5, a top view of a ring-shaped link, Figs. 3, 4, and 5, enlarged.

This invention relates to an improvement in that class of links for chain which are made from sheet metal, the object of the invention being a simple and cheap construction, which will avoid waste and yet produce a chain of great strength for the many purposes for which chains of this character may be employed; and the invention consists in the construction as hereinafter described, and particularly recited inthe claims.

Eachlink of the chain is made from a strip of sheet metal of the width andthickness corresponding to the size or strength of chain required, the length of the strip being somewhat greater than the circumference of the link required. This strip of metal is bent flatwise into link shape, its two ends brought together, lapped, and interlocked, as at a, Fig. 3. This interlocking is transversely across the side of the link, and so that the longitudinal strain of the metal comes upon the hook-like joint produced by such lapping. The links may be elongated links, as seen in Fig. 1, or of ring shape, as seen in Fig. 2, the interlocking being the same in either case. The metal may remain flat; but Iprefer to make the links concavo-convex in transverse section at the bearing-points b b, as seen in Fig. 4, so that the inner surface will be convex or nearly semicircular, and so that the bearing-points between successive links will present a rounded surface to each other. This concave-convex shape of the link may extend only around the ends of an elongated link, or it may extend entirely around the circumference, and this will be the better plan in case of a round or ring link, as seen in Fig. 5.

The concavo-convex shape may be given to the strip of metal before the formation of the link, if desired; but I prefer to produce this transverse concavo-convex shape by striking the link after the flat strip of metal has been bent to the link shape and the ends interlocked.

I claim 1. A chain-link made from a strip of sheet metal in length longer than the circumference of the link, and so that the ends will overlap each other, the ends of each turned backward to form a hook-like termination transversely across the link, the said hooked ends interlocked directly with each other and closed, substantially as described.

2. A chain-link made from a strip of sheet metal in length longer than the circumference of the link, and so that the ends will overlap each other, the ends of each turned backward to form a hook-like termination transversely across the link, the said hooked ends interlocked directly with each other and closed, the metal at the bearing-points of the link of concavo-convex shape in transverse section, and so as to present a rounded surface upon the inside, substantially as described.

7 ANDREW B. HENDRYX. Witnesses:

FRED G. EARLE,

LILLIAN D.-KELSEY. 

